Force-feed lubricator.



H. W. HANCOCK.

FORGE FEED LUBRIGATOR.

APPLICATION FILED NOV.29,1905.

923,832. l Patented .111.168,1909.

N N N l; 1 I n $1 @a Q H ,HARRY W. HANCOCK, OFy CHICAGO, ILLINOIS.

FORCE-FEED LUBRICATOR.

Specication of Letters Patent.

Patented .Tune 8, 1909.

Application filed November 29, .1905. l Serial No. 289,642.

To all whom it may concern:

Be it known that I, HARRY W. HANCOCK, a citizen of the United States, residing at Chicago, in the county of Cook and Stateof Illinois, have invented certain new and useful Improvements in Force-Feed Lubrica# tors, of which the following is a specification.

This invention relates to apparatus for forcing lubricants from a reservoir to the bearings of a machine, and one of its objects is toy provide an apparatus of the character mentioned, which is simple in construction and positive in its operation.

Another object of the inventionis to provide simple and reliable means for varying the rate of discharge to any particular bearing and without yaffecting .the quantity delivered to any other bearing.

A further object is soto arrange the mechanism of a force-feed lubricator that it may be almost wholly housed, as, for example, within the oil reservoir, thus l'esseningthe risk of injury to the mechanism and decreasing the opportunity for tampering.

The invention further refers to the various advantageous features of construction hereinafter set forth.

In the accompanying drawings, Figure 1 is a vertical sectional view through a forcefeed lubricator embodying the features of my invention, said view being taken on the plane of dotted line 1 1' of Fig. 2. Fig. 2 is a vertical sectional view on dotted line 2 2 of In the embodiment herein shown of this invention the operating mechanism is inclosed in an oil reservoir 1 of suitable construction. A framework 2 is secured within the oil reservoir 1 upon the bottom thereof in a manner to be hereinafter described, said framework comprising a valve casing 3, tubula'r stems 4, and end frames 5 all formed, in this instance, from an integral casting. The valve casing 3 has a chamber' 6 for the reception of a rock valve 7 and is provided with inlet ports 8 and outlet ports 9. The longitudinal central opening 1() of each of the stems 4 is alined with one of the outlet ports 9. The rock valve 7 is provided with a plurality of oil passages 1 1 adapted to be brought into alinexnent wlth the o enings 10 and the outlet ports 9, and also as a plurality of ducts 12 adapted to connect the assages 11 and theopcnings 10. The tubu ar stems 4 constitute cylinders for the feeding plungers 13, the central opening 10 of each stem being connected with an inlet port 8 and an outlet port 9 by means of the passages 11 and 12in i the rock valve 7, and each tubular stem formg ing with its plunger a pum unit. It will be understood that there will e as many pum units as there are bearings to be lubricate the embodiment shown in the drawings comprising four units. Delivery ipes 14 convey to be oiled, said pipes in this instance being connected to the oil reservoir by means of flan ed bushings 15 screw-threaded into coinci ing openings 16 in the reservoir 1 and valve casing 3. Said bushings thus also serve to secure the valve casing 3 and the end frames 5 in position within the oil reservoir. A rock shaft 17 is mounted in the upper end of the end frames 5. Upon this shaft 'is xed a plunger-operating frame com rising the bar 18 and two yolres 19. In the ar 18 of said plunger-operating frame are formed openings 20 through which the feeding plungers 13 extend, saidibar having at each side of each of said openings a rounded bearin upon the feeding-plunger. The downward or ejecting movement of the plungers 13 is positive, being produced by the direct pressure of the bar 18, but the upward or suction movement of the plungers is ca able of bein varied in extent, notwithstan ing the fixe' range of movement of the bar 18, by reason of a yieldingnoonnection between said plungers and the bar 18, which yielding connection in surrounding each p unger and bearing on said` bar and on a washer or collar 24 fixed on the plunger. A screw 25 seated in the to wall or cover of the oil reservoir 1 in the ine of movement of eachplunger provides means for limiting the u Ward movement of the plungers thus regu ating the quantity of oil delivered to the bearings. On a cam shaft 26 rotatably mounted in the endv frames 5 are fixed two cams 27, one for each-of the yokes 19 before alluded to. The rotation of said shaft causes a tilting movement of the plunger-operatin frame and a reciprocation of the feeding -p lingers. 'Ihe high portion of each cam has a peripheral surface 28 curved on the arc of a circle concentric with the axis of the cam, in order to hold the plungers 13 stationaryfor a time movement. The shaft 26 is rotated by 4means of a worm wheel 29 fixed on one end of the oil from the outlet ports 9 to the bearings this instance com rises a coiled spring 23Y Iat the extremities of their reciprocatory,

lug 21 adapted to bear upon a collar 22 fixe shown) for driving the mechanism yof the lubricator. If preferred, the shaft 31 may be rotated by a gear connection or a pawl and i ratchet mechanism.

The rock valve 7 is turned to bring its oil assages alternately into register with the inet ports 8 and the outlet ports 9 by means of an arm 33 fixed on one end of said valve outside the valve casingv3, which arm is connected with the worm wheel29 by a connectin rod 34.

IlVhile I have herein shown a rock valve oscillating through an arc of ninety degrees and a crank for oscillating said valve, it is apparent that a valve having a greater or smaller arc of oscillation might be used and that other means might be employed for operating it. j

It will be seen from an ins ection of Fig. 1 that the cams 27 are set aliout a quarterrevolution in advance of the connection of the rod 34 with the worm wheel 29. Assumin the parts to be in the position shown in sai gure, the operation will be as follows: The cams 27, moving in the direction indicated by the arrow, will depress the plungers 13, forcing the oil out ofthe plunger openings 10, through the passages 11 in the rock valve 7 and the outlet ports 9 into the delivery pipes '14. During such downward movement ot the lungers the rock valve will not be rocked su ciently to carry the passaves 11 ont of re ister with the outlet ports 9, but as soon as t 1e cams 27 have passed the lowest point of their orbit the rotation of the worm wheel 29 rocks the valve 7 through about one-quarter of a revolution, bringing the passages 11 and 12 into register with the inlet ports 8 and plunger openings 10, respectively, the plungers 13 in the meantime remaining stationary, owing to the shape of the cams 2'? hereinbefore alluded to. Continuing rotation of the cams 27 raises the plungers 13, drawing a charge oi' oil into the plunger openings y10. The valve 7 is then turned into the discharging position and the cycle of operation just outlined is re eated.

I wish 1t to be understood that I esire not to be limited to the details of construction herein set forth, asvarious modifications will occur to persons skilled in the art.

I claim as my invention:

1. In a force-feed lubricator, in combination, a cylinder having an inlet and an outlet; a unger in said c linder; a single means or reciprocating sai plunger adapted to positively move said plunger in one direction and yieldingly move it in the opposite direction; and an adjustable stop to'limit the movementv of said plunger in the last mentioned direction.

2. In a force-feed lubricator, in combination, a cylinder having an inlet and an outlet; a plunger in said cylinder; a member having a fixed range of movement adapted to bear at one side against a fixed portion of said plunger for moving the latter in one direction; a sprin interposed between the other side of sai member and a fixed point of said plunger; and an adjustable stop for limiting the movement transmitted to said plunger through said spring.

3. In a force-feed lubricator, in combination, a plurality of pump units each comprising-a plunger; means for reciprocating said plunge'rs; a single rock valve for all of said pump units, said rock valve havin a fixed arc of oscillation; and means for a justably limiting the stroke of said plungers.

4. In a force-feed lubricator, in combina- -1tion, a plurality of pump units each comprising a p unger; means for simultaneously reciprocating said plungers; a yielding connection between said plunger and said reciprocating means; and an adjustable stop located in the path of each of said plungers.

' 5. In a force-feed lubricator, in combination, an inclosing casing; a plurality of pump units in said casing, each comprising a plunger; a member having a ixed ranges of movement for reciprocating said plunger; a yielding connection between said member and each of said plungers and an adjustable stop screw extending through the cover of said casing into the Apath of each of said plungers.

' 6. In a force-feed lubricator, in combination, a plurality of pump units each comprising a plunger; a pivoted plunger-operating frame comprising a bar having openings therein through which said lungers extend, said bar being adapted to ear at one side upon a fixed portion of each of said plungers a spring for each of said plu'ngers extending between the other side of said bar and a fixed. portion of the plunger; an adjustable stop for each of said plungers; and means for moving said plunger-operating frame.

7. In an apparatus of the kind described, a pump having a plunger therein, means for actuating said plunger, a resilient connection between said plunger and actuatin means, and an adjustable stop adapted to Vimit the motion of said plunger.

HARRY W. HANCOCK.

Witnesses:

GEORG-E L. CHINDAHL, M. M. DALEY. 

